Fire extinguisher



L ROBINSON FIRE EXTINGUISHER Filed Oct. 10

Mn .om o f INMHMVVWW y l w a l M 2 7 8 -lill vll---.lil tvwmnrlil v l lsLhsblulh'lillil .A`I`l.iv|\liwlvi.vtvllllktlfmllnm\lnuw Z Patented May 5, 1925,

PATENT oFFlcE.'

LUTITIERROBINSON, OF EIJDGRAIJO, KANSAS.

FIRE EXTINGUISHER.

Application led ctober 10, 1923.

Toa-ZZ whom if may concern.'

Be it: known, that l, LUTHER RoINsoN, a citizenot` the'United States, residing at Eldorado, in the county ot Butler and State of Kansas, have invented`-` certain new and useful Improvements in F ire Extinguishers; and I do declarethe following to be a full, clear, and exact description of the invention, suchas willienable others skilled in the art tojwhicli it appertains to make and use the i same,` referencebeing hadto the accompanyextinguishing liquid,` having a removable ing? drawings,A andito the' `figures of yreference marked1 thereon, which form a part oi'v this specification;y y y rIl liis'invention relates' to a tire extinguisher and the primary object thereof is to provide a' novel form of portable lire eX- tinguislrer in which `a Huid may be retained within a casing or'cylinder to be discharged therefrom by gas pressure generated by two separate mediums which combine to form tocreate the pressure within the casing. Such devices generically have been provided betere my invention but I have made a simple novel form of portable `fire extinguish'er in which the means for operating` the extinguisher is both simplified and improved in operation. i

@ne ot the novel. features of the invention is a renewable cartridge containing the elements tor generating' the gas;` Another important feature is the operating mechanism.

All;V ofthe'sewill be apparent by reference to i the followingl description in connection with `the accompanying drawings, in which F l' is a vertical, longitudinal, sectional view through a lire extinguisher constructed inaccordance with my invention andwith the parts in normal positions.

Fig. 2`is asimilar-view showing the parts in position `to permit generation of gas on the liquid, and

Fig. 31 isa fragmentary, perspectiveview oit the renewable cartridge.

The invention is shown as comprising an. outer shell; or casing 1 adapted to contain corer2'having threaded connectiony with the shell `or casing 1 at 3. The cover 2 has a collar t in the form of an elongated tube,

Serial No. 667,642.

thel upper end of which projects above Athe cover 2 and the lower' end ot which projects below the cover 2. The upper end of' the collar 4 receives a packing gland 5 through which projects a plunger stem 6. Theplunger stem has a hollow upper portion '7 provided with an inlet hole or port 8 and an outlet nozzle 9. Thelower end of thestem project-s through the web 10 of the collar which combines with the upper portion of the collar to form a chamber 11 with which the opening 8 may communicate to connect the hollow portion of the stem` 6 with the discharge tube'12 connected to the collar and communicating it with the interior ofv the casing 1. p

The lower portion ot' the collar also carries a nipple 13 threaded thereinto and pro- `vided with a packing 14. The lower end ofthe nipple 13 may receive the threaded 'i0` collar 15 of the removable cover 16` carried tube 18 containing an acid container or bottfle 19. The acidis confined within the bottie 19 by the disruptible cover 20 which may 5,@ consist ot a thin sheet of lead or similar material which will not be` attacked by acid. Above the bottle 19 is a charge of soda 21, inv which is embedded a hollow plunger 22 having a cone-shaped bottom 23 which, when pressure is applied to the plungenwill disrupt the cover 20 to allow the soda to combine with the acid in the bottle 19. In order to insure the combining ot the soda with the acid, I have made the plunger hollow and provided it with a screenlike wall 24C of rcticulated material so that it may contain some oi' the soda. yThe stem 27 ot the plunger is adapted to receive pressure 'from the head 26 on' the end ot the stem 6.

it will be observed that the` head 26 is ot' greater diameter than the stem 6 and that the opening in the` collar 15 is, therefore, ot greater diameter than the stem 6'. Consequently, when pressure is applied to the 100 Til disk-shaped end QG ot the stem (i, the pressure will be coinnninicated to the plunger 2Q.

I preter to make the plunger 22 ot wood so that it will be non-corrosive.

Then pressure is applied to the plunger 22, the cone-shaped end 223 will disrupt the sheet 2O and allow the plunger to pass into the acid contained in the bottle 19; the soda and acid will combine to cause chemical action to start, which will, in turn, cause the acid to splash out into the space above the bottle 19 and attack the soda Q1 contained therein so that the chemicals in the cylinder 18 will combine to form gas.

Since the movement ot the stem G is enough to move the head 26 inwardly away from the cover 16 and in view ot the tact that the opening in the cover 16 is oit greater diameter than the stem G, it is apparent that when the plunger 22 is driven into the bottle as shown in Fig. 2, there will be a space around the stem G through the cover 1G. Therefore, gas can pass into the nipple 13 and escape through the openings 28 into the casing 1. The same movement results in causing the port or opening 8 to register with the chamber 11. lhereifore, the pres sure ot the gas on the liquid will force the liquid through the tube 12 into the chamber 11, through port S, through the hollow portion 7 ot the stem G and through the nozzle 9.

When the gas has discharged all ot the liquid the extinguisher will be depleted. 'lhen it will be necessary to recharge the same. This can be easily accomplished by ren'loving the cover 2, taking olil the chamber casing '1.7, dumping out or removing whatever remains ot the cartridge 18, that is, the bottle Vl) and the plunger 22 and the cartridge shell. can be .removed` and a new cartridge dropped into place.

The stem (l having been restored to the position shown in Fig. 1, the cap 1G is screwed in place so that the parts are reestablished as shown in Fig. 1.

The cartridges may be liept in stock as complete renewals and ordinarily, they will be provided with covers 29, the covers be ing removed, oit course, prior to introduction into the casing 17. Ot course, each time the cartridges are renewed, the casing 1 must be replenished with the liquid, after which the cover 2 is screwed in place.

lt will be apparent that the device is quite simple in construction, that it may be recharged in a sate and expeditious manner, and that the chemicals 'for creating the gas pressure will remain intact over long periods because liability ot them attacking corrosive surfaces or combining will be entirely eliminated since the acid will not attack the glass nor the lead, norwill the dry soda attack the cardboard or fibrous container 18.

Then the parts are in the position shown in Fig. 1 there will be no diliiculty in starting the device to operate because it will be only necessary to ram the end 2S against the wall or any abutment so that the conical end 23 of the plunger 22 will disrupt the cover 20.

The devices may be made for various capacities the exact form and minor details of construction are not important so long as the novel features of the invention are incorporated.

lVhat 1 claim and desire to secure by Letters Patent is:

1. A tire extinguisher comprising a casing having a removable cover with a depending collar, a nipple on the end of the collar, a gas chamber casing connected to the nipple, a plunger stem projecting through the cover and having a head projecting through an opening in the gas chamber casing, the head being ot greater diameter than the stem, the stem having a hollow portion provided with an inlet and an outlet, the inlet communicating with a chamber termed by the collar carried by the cover, the outlet in the stem being on the outside of the casing, and a pipe communicating with the chamber and with the interior of the casing, the gas chamber casing being adapted to contain chemicals rendered active by longitudinal movement ot the plunger.

Q. A lire extinguisher comprising a casing having a rcn'lovable cover with a depending collar, a nipple on the end ot the collar, a gas chamber casing connected to the nipple, a plunger stem projecting through the cover and having a head projecting through an opei'iing in the gas chamber casing. the head being ot greater diameter than the stein, the stem having a hollow portion provided with an inlet and an outlet, the inlet communicating with a chamber formed by the collar carried by the cover, the outlet in the stem being on the outside of the casing, a pipe communicating with the chamber and with the interior ot the casing, a cartridge in the gas chamber casing comprising a tube, an acid containing bottle in the bottom of the tube, adisruptible cover, a soda charge above the bottle. and a soda-containing clement in line with the plunger and .movable thereby to disrupt the cover in the bottle.

3. A cartridge for recharging v[ire extinguishers comprising a tube, an acid containing bottle in the bottom of the tube having a disruptible cover, a charge ot soda above the bottle, and a soda-carrying head embedded in the soda. charge.

L1. A renewable cartridge for lire eatin lguishers comprising a tubular casing, a liquid-containing bottle in the bottom ot the dsruptible cover separating the solid material from the liquid, and a plunger embedded n the solid material, said plunger having a space for carrying some of the Solid material into the bottle.

In testmon)7 whereof I affix my signature.

LUTHER ROBINSON, 

